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21 条记录 (耗时 0.035 秒)

    Molecularly oriented tubular components having a controlled coefficient of thermal expansion
    3.
    发明授权
    Molecularly oriented tubular components having a controlled coefficient of thermal expansion 失效
    具有控制的热膨胀系数的分子导向管状部件

    公开(公告)号：US5135783A

    公开(公告)日：1992-08-04

    申请号：US456571

    申请日：1989-12-29

    申请人： Andrew C. Harvey ,  Richard W. Lusignea ,  James L. Racich

    发明人： Andrew C. Harvey ,  Richard W. Lusignea ,  James L. Racich

    IPC分类号： B29C47/24 ,  B29C55/02 ,  B29C67/24 ,  B32B1/08 ,  B32B27/06 ,  C08J5/00

    CPC分类号： B32B27/06 ,  B29C67/24 ,  B29K2105/0079 ,  B29L2023/00 ,  Y10S428/91 ,  Y10T428/1005 ,  Y10T428/139 ,  Y10T428/1393

    摘要： The present invention is based upon the discovery that ordered polymers, such as PBzT, can be readily formed into tubular structures which retain a biaxial orientation imparted thereto during processing, and that these rigid, high-stiffness tubular components can exhibit near zero coefficient of thermal expansion (CTE). Zero CTE materials are not adversely affected by vast swings in temperature, e.g., from very hot to very cold in short periods of time, nor are they adversely affected by long term exposure to either temperature extreme. The tubular components of the present invention thus represent a revolutionary advance in space based hardware, as the extreme temperatures experienced there will not affect rigidity of structures built using these components.

    摘要翻译： 本发明基于如下发现：有序聚合物例如PBzT可以容易地形成为在加工过程中保持双轴取向的管状结构，并且这些刚性的，高刚度的管状部件可呈现接近零的热系数 扩展（CTE）。 零CTE材料不会受到温度波动的不利影响，例如在短时间内从非常热到非常寒冷，也不会长期暴露于任何一种温度极端而受到不利影响。 因此，本发明的管状部件代表了基于空间的硬件的革命性进步，因为经历的极端温度将不会影响使用这些部件构造的结构的刚性。

    Coextrusion of liquid crystal polymers and thermoplastic polymers
    6.
    发明授权
    Coextrusion of liquid crystal polymers and thermoplastic polymers 有权
    液晶聚合物和热塑性聚合物的共挤出

    公开(公告)号：US6045737A

    公开(公告)日：2000-04-04

    申请号：US136491

    申请日：1998-08-19

    申请人： Andrew C. Harvey ,  Richard W. Lusignea ,  Leslie S. Rubin

    发明人： Andrew C. Harvey ,  Richard W. Lusignea ,  Leslie S. Rubin

    IPC分类号： B29C47/06 ,  B29C47/24 ,  B29C47/28 ,  B29C55/00

    CPC分类号： B29C47/28 ,  B29C47/0023 ,  B29C47/065 ,  B29C47/24 ,  B29C47/268 ,  B29C55/00 ,  B29C47/0026 ,  B29C47/26 ,  B29K2105/0079 ,  Y10T428/10

    摘要： A flat and nearly mechanically isotropic polymer film or sheet, or a tube, can be formed by laminating two or more films, preferably by coextrusion of a liquid crystal polymer film and a thermoplastic polymer film. A liquid crystal polymer layer may be combined with one or more thermoplastic polymer layer in various arrangements. The liquid crystal, and possibly the thermoplastic as well, may have a controlled molecular orientation. The film may be formed by passing a polymer through a set of two or three tubular rotors which are concentric and have facing surfaces which define inner and outer annular polymer flow channels.

    摘要翻译： 可以通过层叠两个或更多个膜，优选通过共挤出液晶聚合物膜和热塑性聚合物膜来形成扁平且几乎机械各向同性的聚合物膜或片或管。 液晶聚合物层可以与一种或多种热塑性聚合物层以各种布置组合。 液晶以及可能的热塑性材料也可以具有受控的分子取向。 膜可以通过使聚合物通过一组两个或三个管状转子而形成，这两个或三个管状转子是同心的并且具有限定内部和外部环形聚合物流动通道的相对表面。